That Logic has advanced in this sure course, even from the earliest times, is apparent from the fact that, since Aristotle, it has been unable to advance a step, and thus to all appearance has reached its completion.

When a thoughtful human being has overcome incentives to vice and is aware of having done his bitter duty, he finds himself in a state that could be called happiness, a state of contentment and peace of mind in which virtue is its own reward.

Both love of mankind, and respect for their rights are duties; the former however is only a conditional, the latter an unconditional, purely imperative duty, which he must be perfectly certain not to have transgressed who would give himself up to the secret emotions arising from benevolence.

All human knowledge begins with intuitions, proceeds from thence to concepts, and ends with ideas.

Nature even in chaos cannot proceed otherwise than regularly and according to order.

Riches ennoble a man's circumstances, but not himself.

God, freedom, and immortality are untenable in the light of pure reason.